rm _id

packages/app/src/server/models/questionnaire/questionnaire-order.ts

@@ -13,7 +13,7 @@ export type QuestionnaireOrderModel = Model<QuestionnaireOrderDocument>
 const questionnaireOrderTitleSchema = new Schema<IQuestionnaireOrder['title']>({
   ja_JP: { type: String, required: true },
   en_US: { type: String, required: true },
-});
+}, { _id: false });
 
 const questionnaireOrderSchema = new Schema<QuestionnaireOrderDocument>({
   title: { type: questionnaireOrderTitleSchema, required: true },

packages/app/src/server/models/questionnaire/schema/question.ts

@@ -5,7 +5,7 @@ import { IQuestion, QuestionType } from '~/interfaces/questionnaire/question';
 const questionTextSchema = new Schema<IQuestion['text']>({
   ja_JP: { type: String, required: true },
   en_US: { type: String, required: true },
-});
+}, { _id: false });
 
 const questionSchema = new Schema<IQuestion>({
   type: { type: String, required: true, enum: Object.values(QuestionType) },